I was going to going to look up something I had seen earlier on the 3D Rad forum for some help, when I got a 404 error. I tried going on other topics, but got the same error. It even happens on the homepage. Are all the posts, all the tutorials, all the addons that people made... gone? If so, I'm really sad, because I used that forum a ton for help by going into old archives, reading old conversations, and becoming embarrassed when I saw some of my first posts on there. I wish I had archived/downloaded the forum to their computer with all the posts.
When I have made searches in google it all way come up with www.inarchive.com which appears to be a archive site and that has all 3drad forum info. I don't think the download links work but all the info is there. All you will have to do is search for the site and topic.
I have been experimenting with Oddity Interactive and it has been great so far. It is a much more complex engine because it uses pure C++ so its a very steep learning curve. The thing 3drad has been a good tool to learn the basic of Game development but your not able to do anything much more than basic concepts.